35 Pass-Gutmann: (Created in 1996 by Peter Claus Gutmann; a Ph.D computer scientist at the University of Auckland.) Overwrites your data 35 times, scrambles the original file name, and then truncates the file size to nothing before Permanent Eraser finally unlinks it from the system.

Resource forks are erased. (Resource forks may contain the code of a program, the commands of a font file, etc.)

PE does NOT erase free space, so use Disk Utility for that.

Supports Drag & Drop.

Can erase CD-RW & DVD-RW

Quick: Fast (1 pass ?)

Complete: Slower, but better (3 pass?)

Of course, there is a preference to warn before erasing.

While not a documented feature, it is great as an emergency tool to empty the trash of recalcitrant files.

Cons

Not recommended for SSDs or Fusion drives.

NOTE: Will only make 1 pass on SSD & Fusion drives, so if high security is an issue, you should probably encrypt the file before erasing. Still, it’s best to avoid using; but no need to be obsessive about it, as SSDs, from an archival perspective, only last ~7 yrs. And 1 pass is really not too bad, especially as your computer may not last that long. [And in some cases, the user might not last that long.]

The Web site does not provide a Contact link, ergo support may be lacking. But Dr. Gutmann could still be contacted by using his campus email.